JPH0327092Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention includes a rotating base mounted on a traveling vehicle body so as to be relatively rotatable around a vertical axis, and a rotary joint installed at the vertical axis position. The point is configured to be relatively rotatable around the vertical axis by a cylindrical traveling vehicle body side member and a bottomed cylindrical swivel base member fitted from above to the traveling vehicle body side member. Regarding the information transmission device of a work vehicle with a swivel platform,
For details, information from the traveling vehicle body side to the turning base side,
Alternatively, the present invention relates to an information transmission device for a working vehicle with a swivel base that transmits information from the swivel base to the traveling vehicle body.

[Conventional technology]

Conventionally, such information transmission devices include:
For example, a structure disclosed in Japanese Utility Model Publication No. 56-37015 was known.

In other words, a rotary joint is constructed by fitting a swivel base side member (inner cylinder) formed into a cylindrical shape into a traveling vehicle body side member (outer cylinder) formed in a bottomed cylinder shape, and the upper end of the rotary joint is An annular contact is provided at the upper end of the swivel base side member, and a cover equipped with a current collecting brush that contacts the annular contact is provided at the upper end of the swivel base side member, and the annular contact is provided with a current collector brush that contacts the annular contact. Wiring was connected through a through path formed along the vertical axis of the swivel base member, and wiring from the swivel base side was connected to the current collecting brush. Information, etc., is exchanged between the swivel table side and the traveling vehicle body side while the corresponding annular contacts and current collector brushes are in contact with each other. They were constructed to be able to slide freely relative to each other so as to maintain their contact state regardless of the rotation of the base.

[The problem that the idea aims to solve]

However, as in the example of the prior art described above, in a device that exchanges information through a pair of electrical contacts that are slidable against each other, the sliding causes the electrical contacts to wear out, resulting in poor durability. There are disadvantages in that noise is likely to be generated at the contacts and the contact portions thereof, and the structure cannot be simplified because a member such as a cover is required to support the electrical contacts.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide excellent information transmission with high durability and extremely low noise generation.
Furthermore, it is an object of the present invention to provide an information transmission device for a working vehicle with a swivel platform, which can simplify the structure for this purpose.

[Means to solve the problem]

In order to achieve the above object, the information transmission device for a working vehicle with a swivel base according to the present invention has the above configuration, and transmits a signal output from one side of the traveling vehicle body or the swivel base to the other side. A non-contact type transmitter and a receiver for transmitting data are installed separately on the traveling vehicle body side member and the swivel base side member of the rotary joint, and the transmitter and the receiver are separately installed. , the rotary joint is formed between an upper surface of the traveling vehicle body side member and a bottom surface of the rotating base side member opposite to the upper surface in a state where the traveling vehicle body side member and the swivel base side member are fitted; It is characterized by being housed in the internal space of the point and being arranged to face each other on the vertical axis.

Next, the effects of the characteristic configuration of the present invention will be described.

[Operation] In other words, since information is transmitted in a non-contact manner using a transmitter and a receiver, there are no problems such as wear and tear of the electrical contacts compared to conventional methods that use sliding electrical contacts. , it is possible to avoid problems such as noise occurring at the contact part.

Furthermore, since these transmitters and receivers are housed in the internal space of the rotary joint formed between the top surface of the traveling vehicle body side member and the bottom surface of the swivel base side member, The rotary joint blocks external noise sources.

Furthermore, since the transmitter and receiver are arranged to face each other on the vertical axis, which is the center of rotation of the swivel base,
A good signal transmission state can be maintained regardless of the rotation of the swivel table, and the arrangement structure of the signal transmission device can be simplified.

[Effect of idea]

Therefore, the information transmission device for a work vehicle with a swivel platform according to the present invention has significantly improved durability compared to conventional contact-type signal transmission devices, suppresses noise generation to the utmost, and has extremely good performance. It has become possible to transmit information, and furthermore, the simple structure has brought about effects such as simplifying the design and manufacturing of rotary joints.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, the swivel base 1 is attached to a traveling vehicle body 23 equipped with a pair of left and right traveling crawlers 2 so that it can be rotated freely by a hydraulic motor 3.
An engine 4 and a control section 5 are mounted on the swivel base 1, and a backhoe work device consisting of a boom 6, an arm 7, and a bucket 8 is connected to the swivel base 1 to constitute a backhoe work vehicle. be.

As shown in FIGS. 1 and 2, a pair of left and right hydraulic pumps 9 for driving the vehicle are attached to the swivel base 1, and the fluid pressure from these pumps 9 is applied to the left and right travel motors 10 on the vehicle body 23 side. Further, a pair of left and right switching valves 12, 12 for operating the traveling hydraulic motor 10 in forward, reverse, and stop directions is provided on the swivel base 1 side.

As shown in FIGS. 2 and 3, the rotational axis of the rotary joint 11, that is, the rotating base 1, is attached to the upper surface of the vehicle body side shaft member 11A as the vehicle body side member constituting the rotary joint 11. The ultrasonic transmitter 13 is attached in a state where it is positioned on the rotation axis X, and the swivel base-side bottomed cylindrical member 1 serves as a swivel base-side member constituting the rotary joint 11.
1B, a receiver 14 for receiving ultrasonic waves from the transmitter 13 is installed at the bottom of the swivel base 1.
It is mounted on the top facing the transmitter 13. Note that the vehicle body side shaft member 11 is arranged so that the transmitter 13 and the receiver 14 are separated from each other.
A space is provided between the upper surface of A and the swivel-side bottomed cylindrical member 11B. A vehicle body direction detection sensor 15 is provided to detect the direction of the traveling vehicle body 23 using a geomagnetic sensor or a gyro compass, and a detection signal of the sensor 15 is transmitted to the transmitter 13 through a modulator 16, and 14 is configured to be transmitted to the swivel table automatic operation control mechanism through the demodulator 17.

To explain in detail the control mechanism for automatic operation of the swivel base, as shown in FIG. A first device 19 for setting a reference rotational position relative to the vehicle body and a second device 20 for setting a target rotational position relative to the vehicle body at which earth and sand from the swivel base 1 should be discharged are provided, and information on these devices 18, 19, and 20 is provided. Based on swivel base 1
A discrimination circuit 22 is provided which automatically operates the operating valve 21 of the hydraulic motor 3 so as to rotate the valve 21 to the target position relative to the vehicle body or the reference rotation position relative to the vehicle body. When the swivel base 1 is manually operated and a state is brought about in which the swivel base 1 is rotated toward the target rotational position relative to the vehicle body or toward the reference rotational position relative to the vehicle body at a rotational speed higher than the set value, the control operation state is automatically switched to. It is structured as follows. In short, to rotate the swivel base 1 to the standard rotation position with respect to the vehicle body or the target rotation position with respect to the vehicle body, if the swivel base 1 is rotated manually in advance by manually operating the valve 21, then the rotation is automatically performed. It has been made possible to do so.

Further, the information from the demodulator 17 is transmitted to a discriminating circuit 22.
When the orientation of the vehicle body changes from the orientation stored at the start of work, the information of the rotational position detection device 18 is corrected in accordance with the amount of change.

In short, when stopping the swivel base 1, the traveling vehicle body 23 may rotate relative to the ground due to the dynamic inertia of the swivel base 1.
3 may rotate, the swivel base 1 can be accurately rotated to a desired ground rotation position.

The information transmission device of the present invention can be applied not only to backhoe work vehicles, but also to various types of work vehicles with swivel stands, such as face shovel work vehicles. In addition to transmitting the direction detection signal of the traveling vehicle body 23 to the control mechanism on the swivel base 1 side as in the embodiment, for example, when the traveling vehicle body 23 side is equipped with an electrically controlled traveling transmission, the swivel base It can be applied to transmit various information, such as transmitting a gear change operation signal from the first side to the traveling vehicle body 23 side.

Furthermore, the specific structure of the information transmission device can be modified in various ways, such as using a light emitting diode as the transmitter 13 and a phototransistor as the receiver 14, for example.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

Figure 1 is a side view of the backhoe work vehicle, Figure 2 is a cutaway side view showing the installation part of the information transmission device, and Figure 3 is a side view of the backhoe work vehicle.
The figure is a block diagram showing the specific configuration of the control mechanism for automatic operation of the swivel table. 1... Swivel base, 11A... Traveling vehicle body side member, 1
1B... Swivel base side member, 13... Transmitter, 14...
...Receiver, 23...Traveling vehicle body, X...Vertical axis center.

Claims (1)

[Scope of utility model registration request] The swivel base 1 is mounted and installed on the traveling vehicle body 23 so as to be relatively rotatable around the vertical axis X, and a rotary joint 11 is provided at the position of the vertical axis X.
The longitudinal axis X is defined by a cylindrical traveling vehicle body side member 11A and a bottomed cylindrical swivel base side member 11B fitted from above to the traveling vehicle body side member 11A.
In the information transmission device for a working vehicle with a swivel platform configured to be relatively rotatable around the traveling vehicle body 23,
Or a contactless transmitter 1 for transmitting a signal output from one side of the swivel base 1 to the other side.
3 and the receiver 14 at the rotary joint 1.
While distributing and attaching it to the traveling vehicle body side member 11A and the swivel base side member 11B, respectively,
The transmitter 13 and the receiver 14 are connected to the upper surface of the traveling vehicle body side member 11A and the swivel base opposite to the upper surface when the traveling vehicle body side member 11A and the swivel base member 11B are fitted together. Side member 11B
is housed in the internal space of the rotary joint 11 formed between the bottom surface of the
An information transmission device for a work vehicle with a swivel platform, characterized in that the devices are arranged facing each other at the top.